/*
 * Copyright (c) 2001-2004 Caucho Technology, Inc.  All rights reserved.
 *
 * The Apache Software License, Version 1.1
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:
 *       "This product includes software developed by the
 *        Caucho Technology (http://www.caucho.com/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "Burlap", "Resin", and "Caucho" must not be used to
 *    endorse or promote products derived from this software without prior
 *    written permission. For written permission, please contact
 *    info@caucho.com.
 *
 * 5. Products derived from this software may not be called "Resin"
 *    nor may "Resin" appear in their names without prior written
 *    permission of Caucho Technology.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL CAUCHO TECHNOLOGY OR ITS CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * @author Scott Ferguson
 */
package com.caucho.hessian.client;

import java.net.URL;
import java.net.URLConnection;
import java.net.HttpURLConnection;

import java.io.InputStream;
import java.io.OutputStream;
import java.io.IOException;
import java.io.FileNotFoundException;

/**
 * Internal connection to a server.  The default connection is based on
 * java.net
 */
public class HessianURLConnection extends AbstractHessianConnection {

    private URL _url;
    private URLConnection _conn;
    private int _statusCode;
    private String _statusMessage;
    private InputStream _inputStream;
    private InputStream _errorStream;

    HessianURLConnection(URL url, URLConnection conn) {
        _url = url;
        _conn = conn;
    }

    /**
     * Adds a HTTP header.
     */
    @Override
    public void addHeader(String key, String value) {
        _conn.setRequestProperty(key, value);
    }

    /**
     * Returns the output stream for the request.
     */
    @Override
    public OutputStream getOutputStream()
            throws IOException {
        return _conn.getOutputStream();
    }

    /**
     * Sends the request
     */
    @Override
    public void sendRequest()
            throws IOException {
        if (_conn instanceof HttpURLConnection) {
            HttpURLConnection httpConn = (HttpURLConnection) _conn;

            _statusCode = 500;

            try {
                _statusCode = httpConn.getResponseCode();
            } catch (Exception e) {
            }

            parseResponseHeaders(httpConn);

            InputStream is = null;

            if (_statusCode != 200) {
                StringBuffer sb = new StringBuffer();
                int ch;

                try {
                    is = httpConn.getInputStream();

                    if (is != null) {
                        while ((ch = is.read()) >= 0) {
                            sb.append((char) ch);
                        }

                        is.close();
                    }

                    is = httpConn.getErrorStream();
                    if (is != null) {
                        while ((ch = is.read()) >= 0) {
                            sb.append((char) ch);
                        }
                    }

                    _statusMessage = sb.toString();
                } catch (FileNotFoundException e) {
                    throw new HessianConnectionException("HessianProxy cannot connect to '" + _url, e);
                } catch (IOException e) {
                    if (is == null) {
                        throw new HessianConnectionException(_statusCode + ": " + e, e);
                    } else {
                        throw new HessianConnectionException(_statusCode + ": " + sb, e);
                    }
                }

                if (is != null) {
                    is.close();
                }

                throw new HessianConnectionException(_statusCode + ": " + sb.toString());
            }
        }
    }

    protected void parseResponseHeaders(HttpURLConnection conn)
            throws IOException {
    }

    /**
     * Returns the status code.
     */
    @Override
    public int getStatusCode() {
        return _statusCode;
    }

    /**
     * Returns the status string.
     */
    @Override
    public String getStatusMessage() {
        return _statusMessage;
    }

    /**
     * Returns the InputStream to the result
     */
    @Override
    public InputStream getInputStream()
            throws IOException {
        return _conn.getInputStream();
    }

    /**
     * Close/free the connection
     */
    @Override
    public void close() {
    }

    /**
     * Disconnect the connection
     */
    @Override
    public void destroy() {
        URLConnection conn = _conn;
        _conn = null;

        if (conn instanceof HttpURLConnection) {
            ((HttpURLConnection) conn).disconnect();
        }
    }
}
